Juniper JUNOS 10.2, Upgrade Manual

Page: 65 / 96

Chapter 5
Completing a Recovery Installation
If the router's software is corrupted or otherwise damaged, you may need to perform
a recovery installation, using the emergency boot disk to restore the default factory
installation. Once you have recovered the software in this fashion, you must configure
the router as you would for a new router.
This chapter discusses the following topics:
■
Creating an Emergency Boot Disk on page 43
■
Saving a Rescue Configuration File on page 44
■
Performing a Recovery Installation on page 45
■
Creating a New Configuration on a Single Routing Engine on page 46
■
Creating a New Configuration with Redundant Routing Engines on page 51
■
Restoring a Saved Configuration on page 56
Creating an Emergency Boot Disk
If the router’s JUNOS Software is damaged in some way that prevents the JUNOS
Software from loading completely, you can use the emergency boot disk to revive
the router. The emergency boot disk repartitions the primary disk and reloads a fresh
installation of the JUNOS Software.
The procedures outlined in this section discuss how to create an emergency boot
disk for any M Series, MX Series, T Series, TX Matrix, or TX Matrix Plus router.
To create an emergency boot disk:
1.
Use FTP to copy the installation media into the router’s
/var/tmp
directory.
2.
Insert the PC Card into the external PC Card slot.
3.
In the UNIX shell, navigate to the
/var/tmp
directory:
start shell
cd /var/tmp
4.
Log in as
su
:
su [enter]
password: [enter SU password]
Creating an Emergency Boot Disk
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